MAINTENANCE OF SOLAR HOME SYSTEMS IN RURAL AREAS by Matimba - PowerPoint PPT Presentation

DESIGN, INSTALLATION AND MAINTENANCE OF SOLAR HOME SYSTEMS IN RURAL AREAS by Matimba Mathebula, Xahumba Engineering Consulting (Pty) Ltd

D ESIGN, INSTALLATION AND MAINTENANCE OF SOLAR HOME SYSTEMS IN RURAL AREAS Table of Contents • Xahumba Engineering Consulting (XEC) Background • Services Offered by XEC • XEC Experience on Solar Systems • Benefits of Using Solar Systems • Solar Home Systems in Rural Areas Project Background Design Installation Maintenance • Conclusion • Recommendations Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

D ESIGN, INSTALLATION AND MAINTENANCE OF SOLAR HOME SYSTEMS IN RURAL AREAS XAHUMBA EENGINEERING CONSULTING BANKGROUND • Founded in the year 2010 as a close-corporation by Mr. Max Chauke Pr. Eng. • Converted to Pty Ltd in 2017 • Directors and management remain the same • 100% black owned, Level 1 BBBEE rating • CIDB Grade: 7 EB PE, 1ME PE • Engineers, technologists and technicians are members of ECSA and SAIEE Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

D ESIGN, INSTALLATION AND MAINTENANCE OF SOLAR HOME SYSTEMS IN RURAL AREAS XEC OFFERED SERVICES • Electrical Engineering • Solar PV Systems • HVAC Systems • Project Management • Energy Audits and Management • Certificate of Compliance Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

D ESIGN, INSTALLATION AND MAINTENANCE OF SOLAR HOME SYSTEMS IN RURAL AREAS SOLAR SYSTEMS EXPERIENCE • More than 1.5MW has been installed, including 2X30MW solar farms as part of IPP • Installed systems include rooftops, carports and ground mounted • Rural, Commercial and Industrial Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

D ESIGN, INSTALLATION AND MAINTENANCE OF SOLAR HOME SYSTEMS IN RURAL AREAS …SOLAR SYSTEMS EXPERIENCE • 30kW Rooftop PV system in Limpopo (Phalaborwa) Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

D ESIGN, INSTALLATION AND MAINTENANCE OF SOLAR HOME SYSTEMS IN RURAL AREAS …SOLAR SYSTEMS EXPERIENCE • Testing and Commissioning of 2X30MW PV solar systems in Limpopo (Witkop & Soutpan) Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

D ESIGN, INSTALLATION AND MAINTENANCE OF SOLAR HOME SYSTEMS IN RURAL AREAS …SOLAR SYSTEMS EXPERIENCE • 30kW Carport PV system in Limpopo (Polokwane) Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

D ESIGN, INSTALLATION AND MAINTENANCE OF SOLAR HOME SYSTEMS IN RURAL AREAS …SOLAR SYSTEMS EXPERIENCE • 160W Solar Home systems in KZN, Free State and North West Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

D ESIGN, INSTALLATION AND MAINTENANCE OF SOLAR HOME SYSTEMS IN RURAL AREAS XEC CLIENTS Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

D ESIGN, INSTALLATION AND MAINTENANCE OF SOLAR HOME SYSTEMS IN RURAL AREAS RENEWABLE ENERGY BENEFITS Advantages of a Solar System No CO2 Emission No Tariff hikes Saves Water Free Power No fossil fuels for Sun is a source 1,28 kilolitres You are your power generation of energy per 1MWh Own distributor Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

D ESIGN, INSTALLATION AND MAINTENANCE OF SOLAR HOME SYSTEMS IN RURAL AREAS SHS PROGRAMME BACKGROUND • South African Government initiated a Non-Grid Programme through Department of Energy (DoE) • High number of households without electricity has been identified • Solar home systems (SHS) technology identified to close the gap • Local municipalities across South Africa are benefiting from the programme • The programmed targets rural communities • DoE appointed XEC and Sun Electricity ( Joint Venture ) in 2015 to provide the design, installation and maintenance Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

D ESIGN, INSTALLATION AND MAINTENANCE OF SOLAR HOME SYSTEMS IN RURAL AREAS SHS DESIGN CLIENT SPECIFICATION XEC CONSIDERATIONS GUIDELINES 2 days of autonomy Minimum of 95Wp solar system SANS 959-1/NRS 052-1 Minimum battery of 96Ah, 12V Solar panel’s operation at local temperature SANS 959-3/NRS 052-3 Maximum of eight lights of8 X 5W lights to be used outside instead of 3W SANS 10142-1 3W each 80% battery’s maximum depth of discharge Connect of DC TV, Radio, DSTV (DoD). Daily recommended is 20% and phone charger System losses Beneficiaries safety. Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

D ESIGN, INSTALLATION AND MAINTENANCE OF SOLAR HOME SYSTEMS IN RURAL AREAS …SHS DESIGN (ENERGY REQUIRED) DESCRIPTION POWER(W) QUANTITY HOURS TOTAL POWER (W) WATT-HOUR Interior Lights 3 6 4 18 72 Exterior Lights 5 2 12 10 120 TV 30 1 4 30 120 Radio 15 1 8 15 120 DSTV-Decoder 10 1 4 10 40 Phone Charger 5 2 2 10 20 Total 93 492 • Minimum solar panel output of 93Wp • 100W solar panel has been selected Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

D ESIGN, INSTALLATION AND MAINTENANCE OF SOLAR HOME SYSTEMS IN RURAL AREAS …SHS DESIGN (LOCAL TEMPERATURE) • Temperature has effect on solar panels • XEC retrieved Eastern Cape Temperatures • -18°C on the 3rd of November 1918 • 50°C on the 28th of June 1996 Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

D ESIGN, INSTALLATION AND MAINTENANCE OF SOLAR HOME SYSTEMS IN RURAL AREAS …SHS DESIGN (LOCAL TEMPERATURE) Description • Panels are tested at standard test conditions (STC) Max power (Pmax) 100W Max power voltage (Vmpp) 18.8V • Each degree rise in temperature above 25˚C affect other parameters Max power current (Imp) 5.51A Open circuit voltage (Voc) 22.1V • Short-circuit current decays by Short circuit current (Isc) 6.04A 0.051%, Cells Polycrystalline • Open-circuit voltage by 0.31%, Number of cells 36 Temperature Coefficient Isc -0.051%/°C • Power by 0.41%. Voc -0.31%/°C Pmax -0.41%/°C Temperature at Standard Test Condition 25°C (STC) Nominal Operating Cell 45°C Temperature (NOCT) Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

D ESIGN, INSTALLATION AND MAINTENANCE OF SOLAR HOME SYSTEMS IN RURAL AREAS …SHS DESIGN (LOCAL TEMPERATURE) 𝑃𝐷_𝑛𝑏𝑦𝑗𝑛𝑣𝑛 = 𝑈 𝑀𝑝𝑑𝑏𝑚_𝑁𝑗𝑜𝑗𝑛𝑣𝑛 + 𝑈𝑇𝐷 ∗ 𝑊 𝑝𝑑 𝑢𝑓𝑛𝑞𝑓𝑠𝑏𝑢𝑣𝑠𝑓 𝑑𝑝𝑓𝑔𝑔𝑗𝑑𝑗𝑓𝑜𝑢 𝑊 + 𝑊𝑝𝑑 100 = −18 − 25 ∗ −0.31 + 21.6 100 = 21.73𝑊 𝑃𝐷_𝑛𝑗𝑜𝑗𝑛𝑣𝑛 = 𝑈 𝑀𝑝𝑑𝑏𝑚_𝑛𝑏𝑦𝑗𝑛𝑣𝑛 + 𝑂𝑃𝐷𝑈 − 𝑈𝑇𝐷 ∗ 𝑊 𝑝𝑑 𝑢𝑓𝑛𝑞𝑓𝑠𝑏𝑢𝑣𝑠𝑓 𝑑𝑝𝑓𝑔𝑔𝑗𝑑𝑗𝑓𝑜𝑢 𝑊 + 𝑊𝑛𝑞𝑞 100 = 50 + 45 − 25 ∗ −0.31 + 18.8 100 = 18.58𝑊 • Voc ranges between 18,58V and 21,73V Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

D ESIGN, INSTALLATION AND MAINTENANCE OF SOLAR HOME SYSTEMS IN RURAL AREAS …SHS DESIGN (BATTERY SIZE) • Recommended days of autonomy is 2 days • Solar panels are less effective during rainy/overcast days • Battery should have enough power to keep the load running 𝐵𝑞𝑞𝑚𝑗𝑏𝑜𝑑𝑓𝑡 𝑋ℎ × 𝐸𝑏𝑧𝑡 𝑝𝑔 𝑏𝑣𝑢𝑝𝑜𝑝𝑛𝑧 𝐶𝑏𝑢𝑢𝑓𝑠𝑧 𝐵ℎ = 𝐸𝑓𝑞𝑢ℎ 𝑝𝑔 𝐸𝑗𝑡𝑑ℎ𝑏𝑠𝑕𝑓 × 𝐶𝑏𝑢𝑢𝑓𝑠𝑧 𝑊𝑝𝑚𝑢𝑏𝑕𝑓 = 492 × 2 0.8 × 12 = 102.5𝐵ℎ • 102Ah battery Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

D ESIGN, INSTALLATION AND MAINTENANCE OF SOLAR HOME SYSTEMS IN RURAL AREAS …SHS DESIGN (BATTERY CHARGING HOURS) • Solar panel should have enough power to charge the selected battery • 100% depth of discharge used for calculations - worst case scenario 𝐼𝑝𝑣𝑠𝑡 𝑆𝑓𝑟𝑣𝑗𝑠𝑓𝑒 = 𝐶𝑏𝑢𝑢𝑓𝑠𝑧 𝐵ℎ × 𝐸𝑝𝐸 × 𝑇𝑧𝑡𝑢𝑓𝑛 𝑊𝑝𝑚𝑢𝑏𝑕𝑓 𝑇𝑝𝑚𝑏𝑠 𝑄𝑏𝑜𝑓𝑚 𝑄𝑝𝑥𝑓𝑠 = 102 × 100% × 12 100 = 12.24ℎ • SANS 959-1:2016 section 4.2.1.3.3, EC sun hours is 5.2 • Approximately 2 days to charge the battery up to 100% Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

D ESIGN, INSTALLATION AND MAINTENANCE OF SOLAR HOME SYSTEMS IN RURAL AREAS …SHS DESIGN (BATTERY CHARGING HOURS) 14 12,24 12 11,02 9,79 10 CHARGING HOURS (H) 8,57 8 7,34 6,12 6 4,9 3,67 4 2,45 2 1,22 0 0 0 10 20 30 40 50 60 70 80 90 100 DOD (%) Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

D ESIGN, INSTALLATION AND MAINTENANCE OF SOLAR HOME SYSTEMS IN RURAL AREAS …SHS DESIGN (SUMMARY) • 100Wp Solar Panel • 102Ah, 12V Battery • 10A Charge Controller • 3W Internal Lights • 5W Exterior Lights • DC TV, Radio and DSTV Points Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

D ESIGN, INSTALLATION AND MAINTENANCE OF SOLAR HOME SYSTEMS IN RURAL AREAS SHS INSTALLATIONS • XEC deployed more than 10 installation teams • Qualified and experienced personnel conducted the installations • Detailed training conducted prior to commencement • Health and quality issues we tackled • One system installed and used as a standard system prior to commencement of installations • Inspection of material • Potential threats were identified and planned for Presenter: Mr. Matimba Mathebula DATE: 23 October 2018